Switch over to use jdbcAuthentication.  Just use the default queries
built-in to Spring Security instead of using a customer
UserDetailsService.  No longer treat User as a Principal.  JUst use the
default principal from the Spring security context.  Enable the create
realtime game line when a new game is created.  Remove the hard-coded
username in the userdao since the logged-in users are now legit db
users.
Remove stompClient connected check since it was checking the wrong
property.  It was always returning false even when checking on
rootScope, so no need for it.
Associate the client with the $rootScope instead of $scope so that there
is only one WebSocket connection made.  Do an undefined check in each
controller and only create it if the client has not yet been created.
Multiple WebSocket connections were showing in the Network tab.  Now,
just one is created with the server.
Display the username of the currently logged-in user.  Add a logout link
that goes to the standard Spring Security /logout url, but also
disconnects the WebSocket client.